<script src="https://www.gstatic.com/firebasejs/4.6.0/firebase.js"></script>
<script>
  // Initialize Firebase
  var config = {
    apiKey: "AIzaSyBHQjxlE2uaJ0janHVGUMsXpPGggkh-XrQ",
    authDomain: "fengerzhcom.firebaseapp.com",
    databaseURL: "https://fengerzhcom.firebaseio.com",
    projectId: "fengerzhcom",
    storageBucket: "",
    messagingSenderId: "84597767663"
  };
  firebase.initializeApp(config);
</script>
